tofsee | 344cdf9460d4d63a1cd728f6edaaf15cdbd540058dc8cb5a48a059a380fe21a4

General

Target

file.exe
Size

247KB
MD5

db0915efc5df3cca31e05b8b3ac0f5ee
SHA1

6d25d1ba8cc8716b6c9f40d6fc998b174418c2bb
SHA256

344cdf9460d4d63a1cd728f6edaaf15cdbd540058dc8cb5a48a059a380fe21a4
SHA512

86126487cd2d78a82e284922eb187280123506d5c9a875c1178f5b35e28784d72507baefcb662061eb20b4ff8633634dd47f251bf93e46707981d91814d55433
SSDEEP

3072:ufniykEWHMXNrACbZ6rDLrBoVDf78BOIKWwtY1:ekEWH+JDbZ6SIOOwt

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
4912	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\nzlnwqzh\ImagePath = "C:\\Windows\\SysWOW64\\nzlnwqzh\\rhdsnfdl.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2890696111-2332180956-3312704074-1000\Control Panel\International\Geo\Nation	file.exe

Executes dropped EXE 1 IoCs

pid	Process
2404	rhdsnfdl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2404 set thread context of 1864	2404	rhdsnfdl.exe	96

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
776	sc.exe
1400	sc.exe
4908	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 208 wrote to memory of 2888	208	file.exe	83
PID 208 wrote to memory of 2888	208	file.exe	83
PID 208 wrote to memory of 2888	208	file.exe	83
PID 208 wrote to memory of 2372	208	file.exe	85
PID 208 wrote to memory of 2372	208	file.exe	85
PID 208 wrote to memory of 2372	208	file.exe	85
PID 208 wrote to memory of 776	208	file.exe	88
PID 208 wrote to memory of 776	208	file.exe	88
PID 208 wrote to memory of 776	208	file.exe	88
PID 208 wrote to memory of 1400	208	file.exe	89
PID 208 wrote to memory of 1400	208	file.exe	89
PID 208 wrote to memory of 1400	208	file.exe	89
PID 208 wrote to memory of 4908	208	file.exe	91
PID 208 wrote to memory of 4908	208	file.exe	91
PID 208 wrote to memory of 4908	208	file.exe	91
PID 208 wrote to memory of 4912	208	file.exe	94
PID 208 wrote to memory of 4912	208	file.exe	94
PID 208 wrote to memory of 4912	208	file.exe	94
PID 2404 wrote to memory of 1864	2404	rhdsnfdl.exe	96
PID 2404 wrote to memory of 1864	2404	rhdsnfdl.exe	96
PID 2404 wrote to memory of 1864	2404	rhdsnfdl.exe	96
PID 2404 wrote to memory of 1864	2404	rhdsnfdl.exe	96
PID 2404 wrote to memory of 1864	2404	rhdsnfdl.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nzlnwqzh\
  2⤵
  PID:2888
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rhdsnfdl.exe" C:\Windows\SysWOW64\nzlnwqzh\
  2⤵
  PID:2372
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nzlnwqzh binPath= "C:\Windows\SysWOW64\nzlnwqzh\rhdsnfdl.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nzlnwqzh "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nzlnwqzh
  2⤵
  - Launches sc.exe
  PID:4908
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:4912

C:\Windows\SysWOW64\nzlnwqzh\rhdsnfdl.exe
C:\Windows\SysWOW64\nzlnwqzh\rhdsnfdl.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:1864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\rhdsnfdl.exe

Filesize
13.9MB

MD5
b6600edba5205d1d244de1f48ee86621

SHA1
9d9075082842ab8ba81e70aaa5b62238adbdec79

SHA256
234403e857d40575c578d34c43fe806ab6dbf1f36a0fb4695a4b88ba8b507c96

SHA512
89a216517cbbc23d26ff6783ddbc9a6c6ff66bfc2aa5a629d5c274f06c346279d54c951ad9c674c88b5679135734b29ddf9232c56e0d954963366717df96e8db

Download Submit
C:\Windows\SysWOW64\nzlnwqzh\rhdsnfdl.exe

Filesize
13.9MB

MD5
b6600edba5205d1d244de1f48ee86621

SHA1
9d9075082842ab8ba81e70aaa5b62238adbdec79

SHA256
234403e857d40575c578d34c43fe806ab6dbf1f36a0fb4695a4b88ba8b507c96

SHA512
89a216517cbbc23d26ff6783ddbc9a6c6ff66bfc2aa5a629d5c274f06c346279d54c951ad9c674c88b5679135734b29ddf9232c56e0d954963366717df96e8db

Download Submit
memory/208-10-0x0000000002450000-0x0000000002463000-memory.dmp

Filesize
76KB

Download
memory/208-4-0x0000000000400000-0x000000000070C000-memory.dmp

Filesize
3.0MB

Download
memory/208-3-0x0000000000400000-0x000000000070C000-memory.dmp

Filesize
3.0MB

Download
memory/208-7-0x00000000008B0000-0x00000000009B0000-memory.dmp

Filesize
1024KB

Download
memory/208-2-0x0000000002450000-0x0000000002463000-memory.dmp

Filesize
76KB

Download
memory/208-9-0x0000000000400000-0x000000000070C000-memory.dmp

Filesize
3.0MB

Download
memory/208-1-0x00000000008B0000-0x00000000009B0000-memory.dmp

Filesize
1024KB

Download
memory/1864-14-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/1864-19-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/1864-20-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/1864-21-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/2404-13-0x0000000000400000-0x000000000070C000-memory.dmp

Filesize
3.0MB

Download
memory/2404-16-0x0000000000400000-0x000000000070C000-memory.dmp

Filesize
3.0MB

Download
memory/2404-12-0x0000000000960000-0x0000000000A60000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads